25678187 has 2 divisors, whose sum is σ = 25678188. Its totient is φ = 25678186.

The previous prime is 25678183. The next prime is 25678223. The reversal of 25678187 is 78187652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25678187 - 2² = 25678183 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (25678183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839093 + 12839094.

It is an arithmetic number, because the mean of its divisors is an integer number (12839094).

Almost surely, 2^25678187 is an apocalyptic number.

25678187 is a deficient number, since it is larger than the sum of its proper divisors (1).

25678187 is an equidigital number, since it uses as much as digits as its factorization.

25678187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 44.

The square root of 25678187 is about 5067.3648970644. The cubic root of 25678187 is about 295.0222601224.

The spelling of 25678187 in words is "twenty-five million, six hundred seventy-eight thousand, one hundred eighty-seven".